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A BGK-type model for inelastic Boltzmann equations with internal energy.

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Figure

Figure 1. Initial datum corresponding to T 33 = 4 T 11 . Hard spheres. The in- in-elasticity parameter is γ = 0.6, different approximations of the cross section are performed.
Figure 3. Evolution of g(t) with a = 0, γ = 0.6. Hard Spheres. In that case (a = 0), only the growing part of g(t) is represented (65)
Figure 4. Evolution of T 12 (t) with γ = 0.3. Maxwell molecules. In that case, (55) has an exact solution which allows to observe the discrepancies between the two models and the exact solution.
Figure 5. Evolution of T 11 (t), T 12 (t) with γ = 0.6. Maxwell molecules. In that case (56) has an exact solution
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